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Digg  imageellipse
Draw an ellipse
(PHP 4 >= 4.0.6, PHP 5)
Example 1006. imageellipse() example<?phpThe above example will output something similar to:  Related Examples ( Source code ) » imageellipse Examples ( Source code ) » Draw ellipse Code Examples / Notes » imageellipseagentyoungsoo
When you wana use "ImageEllipse" function in under GD 2.0.2 version, you can use "ImageArc" like bellow ---------------------------------------------------- $file_name = "test.png"; $screen_x = 300; $screen_y = 200; $x1 = $screen_x / 2; $y1 = $screen_y / 2; $radius = 30; $image = ImageCreate($screen_x, $screen_y); $black = ImageColorAllocate($image, 0,0,0); ImageArc($image, $x1, $y1, $radius , $radius , 0, 360, $black); ImagePng($image, $file_name); ImageDestroy($image); ---------------------------------------------------- simon_nuttall
This is an optimised and bug fixed version of nojer at yahoo dot com's rotatedellipse function. I've changed it so that the arguments are compatible with imageellipse. See notes on imagearc for original version. <?php function rotatedellipse($im, $cx, $cy, $width, $height, $rotateangle, $colour, $filled=false) { // modified here from nojer's version // Rotates from the three o-clock position clockwise with increasing angle. // Arguments are compatible with imageellipse. $width=$width/2; $height=$height/2; // This affects how coarse the ellipse is drawn. $step=3; $cosangle=cos(deg2rad($rotateangle)); $sinangle=sin(deg2rad($rotateangle)); // $px and $py are initialised to values corresponding to $angle=0. $px=$width * $cosangle; $py=$width * $sinangle; for ($angle=$step; $angle<=(180+$step); $angle+=$step) { $ox = $width * cos(deg2rad($angle)); $oy = $height * sin(deg2rad($angle)); $x = ($ox * $cosangle) - ($oy * $sinangle); $y = ($ox * $sinangle) + ($oy * $cosangle); if ($filled) { triangle($im, $cx, $cy, $cx+$px, $cy+$py, $cx+$x, $cy+$y, $colour); triangle($im, $cx, $cy, $cx-$px, $cy-$py, $cx-$x, $cy-$y, $colour); } else { imageline($im, $cx+$px, $cy+$py, $cx+$x, $cy+$y, $colour); imageline($im, $cx-$px, $cy-$py, $cx-$x, $cy-$y, $colour); } $px=$x; $py=$y; } } function triangle($im, $x1,$y1, $x2,$y2, $x3,$y3, $colour) { $coords = array($x1,$y1, $x2,$y2, $x3,$y3); imagefilledpolygon($im, $coords, 3, $colour); } ?> julian
if you want to display an ellipse in the upper left corner of an image, you can easily calculate the corresponding cx and cy values. this example will draw an ellipse having the same width and height as the image. <?php $ellipse_width = 100; $ellipse_height = 200; $ellipse_cx = ($ellipse_width / 2); $ellipse_cy = ($ellipse_height / 2); $img_x = $ellipse_width; $img_y = $ellipse_height; $img = imagecreate($img_x, $img_y); $bg = imagecolorallocate($img, 255,255,255); $ellipse_color = imagecolorallocate($img, 0, 0, 0); imageellipse($img, $ellipse_cx, $ellipse_cy, $ellipse_width, $ellipse_height, $ellipse_color); header("Content-type: image/png"); imagepng($img); imagedestroy($img); ?> |
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